Allright, I'm working mostly from memory here, since Bricklink doesn't include the wands in their minifigure listings (and I'm presuming you're wanting the official wand colors that LEGO's provided?):

- Harry and Hermione both use the basic brown wands (old brown or reddish brown depending on the year)- Ron uses a grey wand (again, old great or light bluish grey, whichever)- Hagrid isn't legally allowed to have a wand, but is supplied with his pink umbrella in the later sets (which is just comprised of a reddish brown 4L bar plus two pink cones)- Draco and Voldemort are both supplied with black wands- Snape has never been officially supplied with a wand, I don't believe.

It might do you well to double check the info using Bricklink, but I think that's it. And yes, 4L for all of them.

joecrowaz on Flickr wrote:Flynn you little wussy with a purple robed fairy for an icon,

I couldn't believe it when they made the shorter bars for the collectible minifigs, and STILL used the freakishly long (for this purpose, anyway) ones to represent wands in the Harry Potter sets. I was so SURE they would make the switch.

I tried to do this a while too, but there are just a lot of inconsistencies. All the PoA sets have Harry with a black wand instead of the brown from the first two releases. Hermione had a tan wand in SS at least, and Malfoy, Crabbe, and Goyle all had brown in the Slytherin set (though Malfoy has had black in every other set, and Crabbe and Goyle are also actually Harry and Ron here...). Lupin had an earth-orange-ish wand, Lockheart had tan and Snape had dark gray in the Dueling Club set.